Year 8 Crossword

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Across
  1. 1. - the process where humans select which organisms to reproduce together based on their desirable traits (selective ______________)
  2. 4. - things that make a species well suited to its environment
  3. 8. - the differences between individuals in a species
  4. 9. - the layer of the Earth where metals are found
  5. 10. - a sign of a chemical reaction
  6. 11. - a type of variation where the characteristic is placed in a category
  7. 13. - a sign of a chemical reaction (________________ change)
  8. 15. - a sign of a chemical reaction (__________ change)
  9. 17. - you can tell which metals are most reactive by placing them in water or _______
  10. 18. - organisms that can reproduce to make fertile offspring are said to be in the same ___________
  11. 20. - the word we use to describe the fact that metals can be stretched into wires
  12. 21. - metals are good heat and electrical _____________
  13. 22. - the list of metals in order of their reactivity (the reactivity ____________)
  14. 23. - a property of metals (to do with their appearance)
Down
  1. 2. - the process where organisms adapt over millions of years to better suit their environment
  2. 3. - the word we use to describe the fact that metals can be reshaped without being broken.
  3. 5. - a type of variation between different species
  4. 6. - an unreactive metal that is found in its pure 'native' form in the ground
  5. 7. - the name for rocks that contain lots of metals
  6. 12. - a type of variation within a species
  7. 14. - metals can be placed in order of how _____________ they are
  8. 15. - a type of variation where the characteristic can be measured
  9. 16. - evolution can be summarised as survival of the _______________
  10. 19. - a type of reaction where a more reactive metal takes the place of a less reactive metal in a compound